Reference Design

Introduction

The reference design consists of the modules DisplayPort TX (DPTX), DisplayPort RX (DPRX), Video Toolbox (VTB), PHY and application. The block diagram is shown below.

The VTB is a collection of video helper modules. It has a timing generator, colorbar generator, FIFO and video clock recovery.

The reference design has two operation modes; colorbar and pass-through. In colorbar mode the test pattern, generated by the VTB, is transmitted by the DPTX to the DisplayPort sink device.

When the pass-through mode is selected, the video coming from the DisplayPort source is captured by the DPRX. Then the video is forwarded to the DPTX through the VTB.

The application has a RISC-V processor, memory (rom and ram) and a set of peripherals. The RISC-V processor runs the application code and DisplayPort IP-core host driver.

The I2C peripheral is used to configure the external reference clock synthesizers (PHY and video clocks). The PHY registers are accessed through the DRP / LMMI / RCFG peripheral.

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Figure 1: Reference design

Running

This paragraph describes how to run the reference design on the board.

Note

The reference design uses the Tentiva board

Tentiva is a video FMC board with DisplayPort sink and source connectors.

Mount the Tentiva board on the FMC HPC connector located on the FPGA development board.

Use the plastic screws to secure the Tentiva board

The reference design is available for the following platforms;